EP3218916A1 - Actionneur electromagnetique à bobines multiples - Google Patents
Actionneur electromagnetique à bobines multiplesInfo
- Publication number
- EP3218916A1 EP3218916A1 EP15804887.6A EP15804887A EP3218916A1 EP 3218916 A1 EP3218916 A1 EP 3218916A1 EP 15804887 A EP15804887 A EP 15804887A EP 3218916 A1 EP3218916 A1 EP 3218916A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil
- magnetic
- differential
- magnetic field
- winding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/30—Electromagnetic mechanisms having additional short-circuited winding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
- H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
Definitions
- the present invention relates to an electromagnetic actuator whose immunity to electric shock has been enhanced. It relates in particular electromechanical actuators which are used in combination with trigger locks of electrical line protection devices, for example differential devices and / or disjunction dependent on the mains voltage.
- An actuator conventionally comprises coils surrounding a movable magnetic core capable of moving from a rest position to an actuating position under the effect of the magnetic field created by the coils. More precisely, it includes:
- magnetic coil generating a magnetic field in response to a fault of the short-circuit type on the current line to be protected.
- the problem to be solved by this invention is as follows: the circuits protected by electrical appliances such as those mentioned before are tested and are subjected to electromagnetic compatibility (EMC) tests, to check whether they are sufficiently immunized against disturbances from other equipment, or more generally from the environment.
- EMC electromagnetic compatibility
- Such an actuator it is customary for such an actuator to be controlled by a control element, for example a thyristor, itself activated when the detection circuit of the device detects a fault.
- a varistor protects the control element in the event of an overvoltage wave as a 1.2 / 50 ⁇ 8 voltage wave. This varistor becomes conductive beyond a defined voltage threshold and thus makes it possible to limit the voltage across the control element to a value lower than the breakdown voltage of the control element.
- a current solution consists in placing an additional varistor at the terminals of the differential coil.
- This solution makes it possible to avoid breakdowns in current wave 8 / 20 ⁇ 8, but has the disadvantage of increasing the voltage (of the order of 1000V) at the terminals of the control element during a voltage wave 1, 2 / 50 ⁇ 8 because of the very strong current (of the order of 1000A) drained by the two varistors in series.
- the control element so as not to degrade prematurely, must be able to withstand such a voltage. It will therefore consist, for example, of a 1200V thyristor or an IGBT, that is to say a relatively expensive component.
- the manufacture of such an electromagnetic actuator will also be simple to implement and inexpensive.
- the electromagnetic actuator according to the invention comprises, in a conventional manner:
- a differential coil generating a magnetic field in response to a differential type fault on the current line to be protected
- a magnetic coil nested with the differential coil, and generating a magnetic field in response to a short circuit-type fault on the current line to be protected.
- This actuator is characterized principally in that it also comprises a third winding coil short-circuited and nested with said differential and magnetic coils, generating a magnetic field opposite the magnetic field created by the magnetic coil.
- the main idea of this invention is to provide an additional short-circuited coil instead of an additional varistor as was the case in the prior art.
- This solution is as advantageous from an economic point of view, since a coil is less expensive than a varistor, than from a compact point of view, because the additional coil is nested in the volume defined by the existing coils and therefore does not take any extra space.
- the magnetic coil When the magnetic coil is traversed by an 8 / 20 ⁇ 8 current wave, it generates a magnetic field.
- the short-circuited coil captures this magnetic field by its positioning in the vicinity of the magnetic coil, and naturally created, by coupling magnetic, an induced current which crosses in the opposite direction to the current flowing in the magnetic coil. This induced current then creates a magnetic field that opposes that created by the magnetic coil. The resulting magnetic field is significantly lower than that initially created by the magnetic coil, which reduces the voltage induced on the differential coil.
- This configuration makes it possible to avoid the breakdowns caused by the 8 / 20 ⁇ 8 current waves, without influencing the good functioning of the actuator during a 1.2 / 50 ⁇ 8 voltage wave.
- the downstream components i.e. the varistor across the control element and the control element, can be selected in a range. lower and therefore less expensive.
- the invention is based on the fact that the three coils are located in the same defined space in order to have a magnetic coupling between them.
- the three coils can even be coaxial in order to simplify their winding and positioning within the actuator. This configuration ensures maximum compactness of the actuator.
- the third short-circuited coil and the differential coil have one point in common for the winding, for example at a pin of a cylindrical jacket around which the coils of the two coils are wound simultaneously at the same time. step of winding during the manufacture of the actuator. This common point thus facilitates the simultaneous winding of the two coils and the integration of the short-circuited coil within the actuator.
- the shorted coil is dimensioned so that it does not interfere with the normal operation of the magnetic and differential coils.
- the invention also protects an electrical line protection apparatus comprising an electromagnetic actuator as described above.
- FIG. 1 shows a schematic view of the actuator according to the invention
- FIG. 2 is a graph showing the evolution of the induced voltage measured on an actuator during a current wave
- the actuator of the invention as illustrated in FIG. 1 comprises a magnetic coil (1) and a differential coil (2) connected in parallel in the protected line, that is to say typically between phase Ph and neutral N This actuator is placed classically upstream of a load present on the line to be protected.
- These coils (1, 2) surround a mobile magnetic core (not shown) capable of moving from a rest position to an actuating position under the effect of the magnetic field created by the coils (1, 2), of closing or opening the contacts (8) positioned upstream of the load.
- This actuator is controlled by a control element (5), a thyristor in this case, itself activated when the detection circuit (not shown) of the device detects a fault.
- This thyristor (5) is placed downstream of the differential coil (2) between the phase Ph and the neutral N.
- a varistor (4) connected in parallel with the thyristor (5), protects the latter in the event of an overvoltage wave.
- This actuator further comprises a short-circuited coil (3) on itself.
- the three coils (1, 2, 3) are separated from each other in Figure 1, but are in fact nested one inside the other so as to generate a magnetic coupling.
- the coil (3) by its short-circuit formation, will always generate a magnetic field opposite to the field generated by the magnetic coil (1) during an 8 / 20 ⁇ 8 current wave, regardless of the direction of winding .
- the voltage across the differential coil (2) is reduced, thereby avoiding dielectric breakdowns and deterioration of the adjacent varistor and thyristor.
- the short-circuited coil (3) and the differential coil (2) can be connected at a common point (7), which is then phase potential.
- the connection is shown in dashed lines in FIG. 1. It serves as an anchor point for the simultaneous winding of the two coils (2, 3).
- FIG. 2 illustrates the reduction of the voltage induced on the differential coil during an 8 / 20 ⁇ 8 current wave of 3000A.
- the magnetic coil has 7 turns
- the differential coil has 1000 turns.
- Curve (10) shows the evolution of the induced voltage measured on an actuator of the prior art as described above, without additional varistor.
- the induced voltage has a peak that climbs beyond 12000V.
- Curve (11) shows the evolution of the induced voltage measured on an actuator according to the invention, with a third coil having 100 turns short-circuited and nested in the other two coils. With respect to the curve (10), the induced voltage is divided by 3, and goes up to 4000V at the maximum.
- Curve (12) finally shows the evolution of the induced voltage measured on an actuator according to the invention, with a third coil having 200 turns short-circuited and nested in the other two coils.
- the increase in the number of short-circuit turns again makes it possible to reduce the induced voltage, and this voltage rises to less than 3000V.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Electromagnets (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1460979A FR3028662B1 (fr) | 2014-11-14 | 2014-11-14 | Actionneur electromagnetique a bobines multiples |
| PCT/FR2015/053039 WO2016075403A1 (fr) | 2014-11-14 | 2015-11-10 | Actionneur electromagnetique a bobines multiples |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3218916A1 true EP3218916A1 (fr) | 2017-09-20 |
| EP3218916B1 EP3218916B1 (fr) | 2018-11-07 |
Family
ID=52988130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15804887.6A Active EP3218916B1 (fr) | 2014-11-14 | 2015-11-10 | Actionneur electromagnetique à bobines multiples |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3218916B1 (fr) |
| CN (1) | CN107148659B (fr) |
| AU (1) | AU2015344910B2 (fr) |
| FR (1) | FR3028662B1 (fr) |
| WO (1) | WO2016075403A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2019447727B2 (en) | 2019-05-29 | 2022-12-08 | Hager-Electro Sas | Electric line (L) protection device for detecting a leakage fault, a short-circuit, fault, an overcurrent fault and an arc fault |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE531282C (de) * | 1931-08-08 | Voigt & Haeffner Akt Ges | UEberstrommagnet mit einer kurzgeschlossenen Daempferwicklung fuer elektrische Schalter, die Netze mit periodisch schwankendem Gleichstrom ueberwachen | |
| FR2779568B1 (fr) * | 1998-06-04 | 2000-07-13 | Schneider Electric Ind Sa | Dispositif de coupure electrique comprenant un dispositif de declenchement differentiel et disjoncteur comprenant un tel dispositif |
| IT1303664B1 (it) * | 1998-12-24 | 2001-02-21 | Abb Ricerca Spa | Circuito elettronico di pilotaggio per attuatore bistabileattivato da piezoelettrici,particolarmente per dispositivi |
| FR2919421B1 (fr) * | 2007-07-23 | 2018-02-16 | Schneider Electric Industries Sas | Actionneur electromagnetique a au moins deux bobinages |
| FR2940500B1 (fr) * | 2008-12-22 | 2010-12-24 | Schneider Electric Ind Sas | Actionneur electromagnetique a double circuits de commande |
| FR2968829B1 (fr) * | 2010-12-10 | 2012-12-21 | Schneider Electric Ind Sas | Disjonteur limiteur de courant |
| FR2974662B1 (fr) * | 2011-04-29 | 2016-04-15 | Hager Electro Sas | Actionneur electromagnetique a generateur magnetique |
| FR2984633B1 (fr) * | 2011-12-16 | 2015-11-06 | F Q N K | Actionneur electromagnetique |
| JP6144090B2 (ja) * | 2013-04-08 | 2017-06-07 | 樋口 俊郎 | 電磁アクチュエータ |
-
2014
- 2014-11-14 FR FR1460979A patent/FR3028662B1/fr not_active Expired - Fee Related
-
2015
- 2015-11-10 WO PCT/FR2015/053039 patent/WO2016075403A1/fr not_active Ceased
- 2015-11-10 EP EP15804887.6A patent/EP3218916B1/fr active Active
- 2015-11-10 CN CN201580061033.XA patent/CN107148659B/zh active Active
- 2015-11-10 AU AU2015344910A patent/AU2015344910B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107148659A (zh) | 2017-09-08 |
| WO2016075403A1 (fr) | 2016-05-19 |
| FR3028662B1 (fr) | 2016-12-16 |
| AU2015344910B2 (en) | 2020-02-20 |
| CN107148659B (zh) | 2019-07-09 |
| AU2015344910A1 (en) | 2017-06-01 |
| FR3028662A1 (fr) | 2016-05-20 |
| EP3218916B1 (fr) | 2018-11-07 |
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